Used the 7d Mark II with the Black Magic assist over the weekend. Results at 1080p 60fps IPB were just marginal enough. I used the Vision X profile. I'm in the same boat as you. Bought a 7dMarkII hoping the guys at ML would hack it. The ProRes feature makes it just barely acceptable to me. If I had to do it all over again I would have a Sony FS5 and two A7sII instead of two C100 Mk I's and a 7DMarkII.